Masabi

Principal Engineer (Payments)

Masabi
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5 months ago
Bucharest, RomaniaStaff+

Responsibilities

  • Shape the technical direction, architecture, standards, and best practices for Masabi’s payments platform.
  • Design and deliver scalable, secure, resilient, and cost-effective payment solutions.
  • Support engineering teams evolving toward a modern service-based architecture while balancing delivery and long-term platform health.
  • Contribute to architecture reviews, design discussions, technical documentation, roadmap planning, prioritisation, and technical scoping.
  • Identify and resolve complex challenges involving scalability, resilience, operational performance, and system evolution.
  • Act as a senior technical advisor across engineering teams, particularly within the payments domain.
  • Collaborate with external payment providers and partners on integrations, technical alignment, and problem-solving.
  • Contribute to engineering standards, technical forums, architecture patterns, and organisational best practices.

Requirements

  • Strong experience working with payment systems, including payment service providers, gateways, EMV, contactless EMV, and acquirers.
  • Good understanding of payment flows, transaction lifecycles, and system-design considerations.
  • Experience designing and evolving distributed systems and service-based architectures.
  • Experience operating at Principal or Staff level and shaping technical direction across multiple teams or domains.
  • Strong technical judgement, communication skills, and ability to balance short-term delivery with long-term architectural outcomes.
  • Comfort navigating ambiguity, translating complex problems into practical approaches, and contributing hands-on when needed.
  • Strong experience with cloud platforms, preferably AWS, and modern infrastructure practices.
  • Experience working with systems where scale, reliability, performance, and cost trade-offs are important.
  • Experience contributing to engineering standards, architecture patterns, or platform direction.
  • Interest in or exposure to AI-enabled systems and their architectural implications in production.
  • Nice to have experience with transit or fare-payment systems, card schemes such as Visa, Mastercard, or Interac, and complex multi-service or event-driven architectures.
  • Familiarity with Kotlin, Java, DynamoDB, MySQL, Terraform, and GitLab CI/CD is beneficial.

Benefits

  • Fully remote work for candidates based in Romania.
  • 25 days of annual holiday plus a Christmas shutdown of approximately 3–4 additional days.
  • Premium medical care through Regina Maria, mental-health support, and menopause support.
  • Regular social gatherings with a monthly employee allowance.
  • Up to €1000 annual training budget and €200 for home-office expenses.
  • Choice of workstation and the ability to work from any country in the world for up to three months per year.

Tech Stack

Amazon DynamoDBAWSGitLab CI/CDJavaKotlinMySQLTerraform

Categories

Masabi

About Masabi

201-500 employees

Masabi builds fare-payment and ticketing platforms for public transit agencies, offering mobile ticketing, account-based ticketing, and open payments through its Justride platform. The company sells its software and services to transport authorities and operators, enabling riders to pay via apps, ticket machines, or contactless bank cards. Founded in 2012 and headquartered in London, it is privately held and serves agencies in North America and Europe.

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